The easiest way to do this is to just have settings be a module.
(settings.py)
CONSTANT1 = "value1"
CONSTANT2 = "value2"
(consumer.py)
import settings
print settings.CONSTANT1
print settings.CONSTANT2
When you import a python module, you have to prefix the the variables that you pull from it with the module name. If you know exactly what values you want to use from it in a given file and you are not worried about them changing during execution, then you can do
from settings import CONSTANT1, CONSTANT2
print CONSTANT1
print CONSTANT2
but I wouldn’t get carried away with that last one. It makes it difficult for people reading your code to tell where values are coming from. and precludes those values being updated if another client module changes them. One final way to do it is
import settings as s
print s.CONSTANT1
print s.CONSTANT2
This saves you typing, will propagate updates and only requires readers to remember that anything after s is from the settings module.